CN117818844A - Method for installing thin film type enclosure system for low-temperature liquid cargo storage and transportation - Google Patents
Method for installing thin film type enclosure system for low-temperature liquid cargo storage and transportation Download PDFInfo
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- CN117818844A CN117818844A CN202410251272.2A CN202410251272A CN117818844A CN 117818844 A CN117818844 A CN 117818844A CN 202410251272 A CN202410251272 A CN 202410251272A CN 117818844 A CN117818844 A CN 117818844A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003860 storage Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 title claims abstract description 24
- 239000010409 thin film Substances 0.000 title claims description 19
- 238000003825 pressing Methods 0.000 claims abstract description 81
- 238000007789 sealing Methods 0.000 claims abstract description 59
- 238000004873 anchoring Methods 0.000 claims abstract description 47
- 238000009434 installation Methods 0.000 claims abstract description 24
- 230000000149 penetrating effect Effects 0.000 claims abstract description 18
- 239000000853 adhesive Substances 0.000 claims abstract description 12
- 230000001070 adhesive effect Effects 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims description 127
- 239000010408 film Substances 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 32
- 239000012774 insulation material Substances 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000004021 metal welding Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 13
- 238000007788 roughening Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000010964 304L stainless steel Substances 0.000 description 4
- 229910001374 Invar Inorganic materials 0.000 description 4
- 230000008602 contraction Effects 0.000 description 4
- 239000011120 plywood Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 239000004484 Briquette Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Abstract
The invention relates to a mounting method of a film type enclosure system for low-temperature liquid cargo storage and transportation, which is characterized in that a first anchoring piece is matched with a first pressing block to mount a secondary insulating module on a ship body structure, after the internal thread blind holes of the first pressing block are temporarily plugged, a flexible secondary shielding wall is paved and bonded along the gap between adjacent secondary insulating modules, the position of the flexible secondary shielding wall corresponding to the internal thread blind holes is cut off, after the temporary plugging of the internal thread blind holes is removed, a second anchoring piece is penetrated to be matched with the second pressing block to fix a main insulating module, and finally a third anchoring piece mounting fastening clamping plate is lapped in a lap joint groove at the edge of the main insulating module. According to the invention, the anchoring piece is used for installing and fixing the secondary insulating module and the primary insulating module, so that the installation efficiency and strength are improved, the diaphragm realizes the first-layer sealing of the outer area of the internal thread blind hole, the outer area of the diaphragm is filled and sealed by the adhesive, and the tightness of the position of the second anchoring piece penetrating through the flexible secondary screen wall is ensured.
Description
Technical Field
The invention relates to the field of ship construction, in particular to a method for installing a thin film type enclosure system for low-temperature liquid cargo storage and transportation.
Background
The enclosure system is generally formed by combining a main layer sealing film, a main layer insulating layer, a secondary layer sealing film and a secondary layer insulating layer in four layers, and is subjected to low Wen Yehuo storage and transportation pressure and low temperature. The secondary insulating layer is generally mounted by bonding or anchoring, and the primary insulating layer is generally fixed to the secondary insulating layer by bonding or anchoring. The installation of the primary sealing film and the secondary sealing film needs to ensure tightness and avoid liquid cargo leakage. The secondary insulating layer and the primary insulating layer are typically formed by splicing and combining the secondary insulating module and the primary insulating module.
The existing installation mode comprises the steps of sequentially installing the secondary insulating module, the secondary sealing film, the main insulating layer and the metal corrugated plate or installing the secondary insulating layer, the secondary sealing film and the main insulating layer after prefabricating the secondary insulating layer, the secondary sealing film and the main insulating layer into a whole.
When adopting the bonding mode to carry out secondary insulating module and main insulating module and installing, on the one hand installation fastness is less than mechanical connection's such as anchor intensity, and on the other hand bonding cycle is longer relatively, and needs to fix a position and fix temporarily with the help of the frock in the bonding process. If the primary insulating module is anchored on the secondary insulating module, the local stress requirement on the secondary insulating module is high.
The primary seal film adopts invar steel, 304L stainless steel corrugated plate generally, the secondary seal film adopts invar steel, 304 stainless steel or glass fiber composite metal film generally, such secondary seal film of invar steel, 304L stainless steel can be fixed through bonding, welded mode, and glass fiber composite metal film is limited by the material and then can only be installed by adopting bonding mode, and the bonding installation form leads to relatively poor fastness, and the adoption of welding and anchoring modes has the limitation on the material, and can not adopt the metal piece to pass the flexible secondary screen wall for fixing when the primary insulation module is installed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for installing a thin film type enclosure system for low-temperature liquid cargo storage and transportation, which is used for fixing a main layer insulation module, a secondary layer insulation module and a flexible secondary screen wall in a mechanical anchoring manner, so that the installation and construction are convenient, the construction efficiency is improved, and the stability and the firmness of the enclosure system are improved.
The technical purpose of the invention is realized by the following technical scheme:
a method of installing a thin film containment system for cryogenic liquid cargo storage and transportation, the method comprising:
step 1, marking out a positioning line and a positioning point on a ship body structure, installing an anchor base according to the positioning point, then installing a sub-layer insulation module according to the positioning line, prefabricating a rigid sub-screen wall on the sub-layer insulation module, forming a plurality of lower spaces between adjacent sub-layer insulation modules, and positioning the anchor base at the bottom of the lower spaces;
step 2, installing a first anchoring piece in each lower space, wherein one end of the first anchoring piece is in threaded fit connection with an anchoring piece base, the other end of the first anchoring piece is connected with a first pressing block, and the first pressing block presses the sub-layer insulation module and fills the upper end of the lower space to be flush with the upper end surface of the sub-layer insulation module; the center of the upper end face of the first pressing block is provided with an internal thread blind hole;
step 3, paving a flexible secondary screen along the gap between adjacent secondary insulating modules after temporarily plugging the internal thread blind holes, wherein the flexible secondary screen covers the edge of the rigid secondary screen and completely covers the upper end face of the first pressing block, and the flexible secondary screen is bonded with the rigid secondary screen and the upper end face of the first pressing block;
step 4, cutting off the position of the flexible secondary screen wall corresponding to the internal thread blind hole, removing temporary plugging at the internal thread blind hole, installing a main layer insulation module corresponding to each secondary layer insulation module, placing the main layer insulation module on the rigid secondary screen wall of the secondary layer insulation module, and arranging a lap joint groove at the edge of the upper end face of the main layer insulation module;
step 5, forming a plurality of upper spaces between adjacent main layer insulating modules, wherein the upper spaces correspond to the lower spaces up and down, a second anchoring piece and a second pressing block are arranged in each upper space, one end of the second anchoring piece penetrates through the flexible secondary screen wall and then is in threaded fit connection with the internal thread blind hole, the other end of the second anchoring piece is connected with the second pressing block, and the second pressing block presses the main layer insulating modules;
and 6, installing a fastening clamping plate in the lap joint groove at the edge of the main layer insulating module, embedding the fastening clamping plate into the lap joint groove at the edge of the adjacent main layer insulating module, and penetrating through the third anchoring piece through the threaded fit connection between the fastening clamping plate and the upper end surface of the second pressing block to realize the installation of the fastening clamping plate.
Further, the method further comprises the steps of paving a main layer sealing film above the main layer insulating module, arranging a metal welding plate on the fastening clamping plate, covering the main layer sealing film above the main layer insulating module after the fastening clamping plate is installed, and welding the main layer sealing film with the metal welding plate.
Further, the third anchoring piece comprises a third screw rod, a metal sealing piece and a metal sealing cap, one end of the third screw rod is in threaded fit connection with the upper end face of the second pressing block, then the other end of the third screw rod penetrates through the fastening clamping plate, the metal sealing cap is in threaded fit connection with the end portion of the third screw rod, and the metal sealing piece is locked on the fastening clamping plate through the metal sealing cap.
Further, the third screw is also provided with a lock nut, and after the third screw is in threaded connection with the second pressing block, the third screw is locked from the upper end surface of the second pressing block through the lock nut.
Further, when the main layer sealing film is installed, the edge of the main layer sealing film is pre-opened corresponding to the position of the third anchoring piece, the main layer sealing film at the opening position is welded on the metal sealing sheet in a lap joint mode, and then the metal sealing cap is welded with the metal sealing sheet.
Further, in step 1, a distance plate is further sleeved outside the anchor base, the distance plate is square, a through hole is formed in the center of the distance plate corresponding to the anchor base, and the anchor base penetrates through the through hole in the center of the distance plate.
Further, in step 1, before the sub-layer insulation module is installed, strip-shaped bearing resin is coated on the opposite surface of the rigid sub-screen wall of the sub-layer insulation module, and the sub-layer insulation module is positioned according to the positioning line and the distance plate.
Further, the edges of the sub-layer insulating modules are provided with U-shaped grooves, first lower cushion blocks are arranged in the U-shaped grooves, and the U-shaped grooves of adjacent sub-layer insulating modules are oppositely arranged to form lower spaces; the first pressing block is clamped into the U-shaped groove from the upper part of the first lower cushion block.
Further, a cross-shaped space is formed in the first lower cushion block in the lower space in cooperation with the U-shaped groove, a cross-shaped rigid heat insulation material is sleeved outside the first anchoring piece, and the cross-shaped rigid heat insulation material is filled in the cross-shaped space.
Further, in step 3, a diaphragm is mounted on the upper end face of the first pressing block in a bonding mode, the diaphragm covers the internal thread blind hole, the region of the upper end face of the first pressing block outside the diaphragm is roughened, and then after the surface of the flexible secondary screen is coated with an adhesive, one side, coated with the adhesive, of the flexible secondary screen is bonded on the rigid secondary screen and the upper end face of the first pressing block.
Further, in step 4, the flexible secondary screen wall and the diaphragm corresponding to the position of the internal thread blind hole are sequentially cut off, and the cut-off area size is larger than or equal to the caliber size of the internal thread blind hole and does not exceed the range of the diaphragm.
Further, the main layer insulation module comprises a lower insulation block, a middle plate, an upper insulation block and a top plate which are sequentially overlapped and prefabricated into a whole, rectangular notches which are vertically corresponding to the edges of the lower insulation block and the edges of the upper insulation block are respectively arranged, and the rectangular notches of adjacent main layer insulation modules are oppositely arranged to form an upper space; the area of the top plate is smaller than that of the upper heat insulation block, and the edge of the top plate forms a lap joint groove on the upper end face of the upper heat insulation block.
Further, the top plate is provided with crisscross penetrating type gas replacement slits, and the penetrating type gas replacement slits penetrate through the thickness direction of the top plate; the upper heat insulation block is provided with a non-penetrating gas replacement joint corresponding to the penetrating gas replacement joint.
Further, before the main insulating module is installed, a second lower cushion block is installed in a rectangular notch at the edge of the lower insulating block, the hardness of the second lower cushion block is greater than that of the lower insulating block, and the second lower cushion block is fixedly connected with the lower insulating block and the middle plate; when the main layer insulating module is installed, the second pressing block is lapped and embedded into a rectangular notch at the edge of the upper heat insulation block to fix the main layer insulating module above the sub layer insulating module.
Further, the second lower cushion block is fixedly connected with the lower heat insulation block and the middle plate through bonding or rivet connection.
Further, after the sub-layer insulating modules are installed and before the flexible secondary screen wall is installed, filling flexible heat-insulating materials between adjacent sub-layer insulating modules; after the main layer insulating modules are installed and before the fastening clamping plates are installed, flexible heat-insulating materials are filled between adjacent main layer insulating modules; the flexible insulating material fills the areas outside the lower space and the upper space.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the first anchoring piece, the second anchoring piece and the third anchoring piece are used for installing and fixing the secondary layer insulation module and the main layer insulation module, so that on one hand, the strength is higher, on the other hand, a large amount of waiting for bonding and curing time is saved, the installation efficiency is improved, and no special tool is required to be designed for temporarily fixing the secondary layer insulation module and the main layer insulation module.
(2) The second anchor assembly passes through the position of the flexible secondary screen wall, the diaphragm achieves the first layer sealing of the external area of the internal thread blind hole, the external area of the diaphragm is filled and sealed through the adhesive between the upper part of the first pressing block and the flexible secondary screen wall, the tightness of the position of the second anchor assembly passing through the flexible secondary screen wall is guaranteed, and the problem that the existing secondary layer sealing film of the glass fiber composite metal film cannot penetrate through a metal piece is solved.
Drawings
FIG. 1 is a schematic drawing of alignment scribing in the present invention.
FIG. 2 is a schematic illustration of a strip-shaped carrier resin coating according to the present invention.
Fig. 3 is a schematic view of the installation of a sub-layer insulation module according to the present invention.
Fig. 4 is a schematic view of the first press block installation completion in the present invention.
Fig. 5 is a schematic view of a first anchor installation in accordance with the present invention.
Fig. 6 is a schematic view of the flexible secondary barrier paving of the present invention.
Fig. 7 is a schematic view of a main insulation module installation in the present invention.
Fig. 8 is a schematic view of a second anchor and a third anchor installation in accordance with the present invention.
Fig. 9 is a schematic view of the installation of the fastening clip of the present invention.
FIG. 10 is a cross-sectional view of the thin film containment system for cryogenic liquid cargo storage and transportation of the present invention after installation.
Fig. 11 is a schematic view of a main layer insulation module structure in the present invention.
Fig. 12 is a schematic view of a sub-layer insulation module structure according to the present invention.
Fig. 13 is a schematic view showing the structure of the fastening clip plate arranged along the width direction of the main layer insulation module in the present invention.
Fig. 14 is a schematic view showing the structure of the fastening clip plate arranged along the length direction of the main layer insulation module in the present invention.
Fig. 15 is a partial schematic view of a second anchor passing through a flexible secondary barrier site.
In the figure, 1, a sublayer insulation module; 2. a main layer insulation module; 3. a rigid secondary screen; 4. a flexible secondary barrier; 5. a hull structure; 6. a first anchor; 7. a first briquette; 8. a second anchor; 9. fastening a clamping plate; 10. a third anchor; 11. a second briquetting; 12. a primary layer sealing film; 13. a positioning line; 14. a flexible thermal insulation material; 15. an internal thread blind hole; 16. a diaphragm; 17. an adhesive; 18. roughening the area;
101. a U-shaped groove; 102. a lower space; 103. a secondary layer heat preservation block; 104. a sub-layer bottom plate; 105. a first lower pad; 106. a cross-shaped rigid thermal insulation material; 107. a strip-shaped carrier resin;
201. a lower thermal insulation block; 202. a middle plate; 203. an upper thermal insulation block; 204. a top sheet; 205. a second lower pad; 206. a lap joint groove; 207. a through-type gas replacement slit; 208. a non-penetrating gas displacement slit;
601. an anchor base; 602. a distance plate; 603. a first screw; 604. a first disc spring; 605. a first locking cap;
701. a first lower platen; 702. a first middle bridge block; 703. a first upper support plate; 704. a first bolt; 705. a first spring;
801. a second screw; 802. a second disc spring; 803. a second locking cap;
901. a metal welding plate; 902. overlap the end;
1001. a third screw; 1002. a metal sealing sheet; 1003. a metal sealing cap; 1004. a lock nut;
1101. a second lower platen; 1102. a second middle bridge block; 1103. a second upper support plate; 1104. a second bolt; 1105. and a second spring.
Detailed Description
The technical scheme of the invention is further described below with reference to the specific embodiments:
a method of installing a thin film containment system for cryogenic liquid cargo storage and transportation, the method comprising:
step 1, marking out positioning lines 13 on the hull structure 5 according to the size and the installation position of the sub-layer insulation modules 1, marking out positioning points on the hull structure 5 according to the installation position of the first anchoring piece 6, wherein the positioning points are positioned between the positioning lines of two adjacent sub-layer insulation modules 1, installing the anchoring piece bases 601 according to the positioning point welding of the hull structure 5 such as bulkheads, as shown in fig. 1, and then installing the sub-layer insulation modules 1 according to the positioning lines 13.
As shown in fig. 12, the secondary insulation module 1 comprises a secondary insulation block 103 and a secondary bottom plate 104, wherein the secondary insulation block 103 is adhered to the secondary bottom plate 104, the secondary insulation block 103 adopts a heat insulation material with smaller heat conductivity coefficient, such as a polyurethane foam block, and the secondary bottom plate 104 is made of a hard nonmetallic material, such as a wood plate, a plywood and the like; the U-shaped groove 101 is arranged on the side surface of the secondary layer heat insulation block 103 and penetrates through the thickness direction of the secondary layer heat insulation block 103, a first lower cushion block 105 is arranged in the U-shaped groove 101, and the first lower cushion block 105 is attached to the inner wall of the U-shaped groove 101. The edges of the rigid secondary screen walls 3 are provided with U-shaped openings corresponding to the U-shaped grooves, the rigid secondary screen walls 3 are prefabricated on the secondary layer heat insulation blocks 103 of the secondary layer insulation modules 1, the upper end faces of the secondary layer heat insulation blocks 103 are completely covered through the rigid secondary screen walls 3, and the rigid secondary screen walls 3 and the secondary layer heat insulation blocks 103 are bonded through glue.
The U-shaped grooves between adjacent sub-layer insulating modules 1 are oppositely arranged to form a plurality of lower spaces 102, and the anchor bases 601 are positioned at the bottoms of the lower spaces.
The anchor base 601 is welded on the hull structure 5, and because of the difference in levelness of different positions of the hull structure 5, if the sub-layer insulation module 1 is directly placed on the hull structure 5, the flatness of the sub-layer insulation module 1 is difficult to adjust and control, therefore, a distance plate 602 is further sleeved outside the anchor base 601, the distance plate 602 is square, the center of the distance plate 602 is provided with a through hole corresponding to the anchor base 601, the anchor base 601 in the embodiment is in a cylindrical structure, the corresponding through hole in the center of the distance plate 602 is circular, and the anchor base passes through the through hole in the center of the distance plate 602. The distance plate 602 is made of a plurality of layers of plywood, the thickness of the distance plate 602 is controlled by adjusting the number of layers of plywood, the sub-layer insulation module 1 is placed on the distance plate 602, and the flatness of the installation of the sub-layer insulation module 1 is ensured by adjusting the thickness of the distance plate 602 at each position.
Before the installation of the sub-layer insulation module 1, the opposite side of the sub-layer insulation module 1, on which the rigid sub-screen 3 is arranged, i.e. the sub-layer base plate 104, is coated with a strip-shaped carrier resin 107, as shown in fig. 2, the sub-layer insulation module 1 is positioned according to the positioning lines and the distance plates.
Step 2, as shown in fig. 3, 4, 5 and 12, installing a first anchor 6 in each lower space 102, wherein one end of the first anchor 6 is connected with an anchor base 601 in a threaded fit manner, the other end of the first anchor 6 is connected with a first pressing block 7, and the first pressing block 7 presses the sub-layer insulation module 1 and fills the upper end of the lower space 102 to be flush with the upper end surface of the sub-layer insulation module 1; specifically, the first presser 7 is lap-pressed against the first lower pad 105.
The first anchoring member 6 comprises a first screw 603, external threads are respectively arranged at two ends of the first screw 603, one end of the first screw 603 is connected with the anchoring member base 601 in a threaded fit manner, and the other end of the first screw 603 is connected with the first pressing block 7.
Preferably, the first pressing block 7 is provided with an elastic space for the telescopic adjustment of the first anchoring piece 6, and a deformation buffer space is provided for the thermal expansion and contraction change of the sub-layer insulation module through the elastic space.
The first pressing block 7 comprises a first lower pressing plate 701, a first middle bridging block 702 and a first upper supporting plate 703, wherein the first lower pressing plate 701 and the first upper supporting plate 703 are respectively arranged on the upper side and the lower side of the first middle bridging block 702; the first middle bridging block 702 is provided with a containing cavity corresponding to the first lower pressing plate 701;
one end of the first screw 603 passes through the first lower pressing plate 701 in a clearance mode and then stretches into the accommodating cavity, a first disc spring 604 and a first locking cap 605 are arranged in the accommodating cavity corresponding to the first screw 603, the first disc spring 604 is sleeved outside the first screw 603, the first locking cap 605 limits the first disc spring 604 between the first lower pressing plate 701 and the first locking cap 605, and the first locking cap 605 is in threaded fit connection with the end portion of the first screw 603; when the thermal expansion and contraction change occurs to the sub-layer insulation module, the first screw rod moves relatively to the first lower pressing plate so as to adapt to the deformation of the sub-layer insulation module and avoid the damage of the sub-layer insulation module caused by overlarge local stress.
An internally threaded blind hole is provided in the center of the upper end surface of the first upper support plate 703, and one end of the second anchor member 8 is connected to the internally threaded blind hole.
A circle of first bolts are uniformly arranged on the edge of the first upper supporting plate 703, in this embodiment, the planes of the first upper supporting plate 703, the first middle bridging block 702 and the first lower pressing plate 701 are square, a first bolt 704 is respectively arranged at the four corners of the first upper supporting plate 703, and the first bolts 704 sequentially pass through the first upper supporting plate 703 and the first middle bridging block 702 and are then in threaded fit connection with the four corners of the first lower pressing plate 701; the first middle bridging block 702 is provided with a step hole corresponding to each first bolt 704, a first spring 705 is arranged in the step hole, one end of the first spring 705 extends out of the step hole, and the first bolts 704 penetrate through the first springs 705 in the step hole.
After one end of the first screw 603 is connected with the anchor base 601, a first pressing block 7 is installed, a round hole in the center of the first lower pressing plate 701 is aligned with the first screw 603 so that the first screw 603 passes through the first lower pressing plate 701, then a first disc spring 604 is sleeved outside the first screw 603 above the first lower pressing plate, and the first disc spring 604 is locked through a first locking cap 605. Then, a first middle bridging block 702 is installed, the first middle bridging block 702 is placed on the first lower pressing plate 701, a first spring 705 is placed in a step hole of the first middle bridging block 702, and the first upper supporting plate 703, the first middle bridging block 702 and the first lower pressing plate 701 are connected through a first bolt.
Preferably, before the first pressing block 7 is installed, the cross-shaped space is formed by the first lower cushion block 105 matched with the U-shaped groove 101 in the lower space 102, the cross-shaped rigid heat insulation material 106 is sleeved outside the first screw 603 of the first anchoring piece 6, and the cross-shaped space is filled with the cross-shaped rigid heat insulation material 106.
After the sub-layer insulating modules 1 are installed and before the flexible secondary screen wall is installed, the flexible heat insulation material 14 is filled between the adjacent sub-layer insulating modules 1, and the flexible heat insulation material 14 is not filled in the lower space 102.
Step 3, paving a flexible secondary screen along the gap between adjacent secondary insulating modules after temporarily plugging the internal thread blind holes, wherein the flexible secondary screen covers the edge of the rigid secondary screen and completely covers the upper end face of the first pressing block, and the flexible secondary screen is bonded with the rigid secondary screen and the upper end face of the first pressing block;
specifically, a diaphragm 16 is adhered and installed on the upper end face of the first pressing block 7, the diaphragm 16 covers the internal thread blind hole 15, the diaphragm such as a glass adhesive tape, the internal thread blind hole 15 is plugged through the diaphragm 16, the roughening treatment is carried out on the upper end face area of the first pressing block 7 outside the diaphragm 16, the roughening treatment is carried out on the roughening area 18, and the roughening mode such as roughening treatment is carried out; the side of the flexible secondary screen 4 coated with the adhesive is then bonded to the rigid secondary screen 4 and the upper end face of the first press block 7 after the surface of the flexible secondary screen 4 is coated with the adhesive 17, as shown in fig. 6 and 15.
The upper end face of the first pressing block 7 of the covering area of the diaphragm 16 is smooth, the phenomenon that the adhesive 17 enters the internal thread blind hole 15 when the flexible secondary screen 4 is installed is avoided, the roughening area 18 of the upper end face of the first pressing block 7 outside the covering area of the diaphragm 16 is coarser than the covering area of the diaphragm, the effective combination of the adhesive 17 in the area outside the internal thread blind hole 15 and the first pressing block 7 is ensured, and the tightness of the upper end face area of the first pressing block 7 is further ensured.
Step 4, cutting off the position of the flexible secondary screen wall 4 corresponding to the internal thread blind hole 15, removing temporary plugging at the position of the internal thread blind hole 15, sequentially cutting off the flexible secondary screen wall 4 and the diaphragm 16 corresponding to the position of the internal thread blind hole, cutting off the size of the area which is larger than or equal to the caliber of the internal thread blind hole 15 and does not exceed the coverage range of the diaphragm 16, then installing the main layer insulating module 2 corresponding to each secondary layer insulating module, placing the main layer insulating module on the rigid secondary screen wall of the secondary layer insulating module, and arranging a lap joint groove at the edge of the upper end face of the main layer insulating module.
Since the flexible secondary screen 4 is mounted to completely cover the blind internal thread 15, the position of the blind internal thread 15 needs to be found after the flexible secondary screen 4 is mounted, and this embodiment provides a solution:
marking points are made on the rigid secondary screen 3 of the secondary insulating module corresponding to the positions of the internal thread blind holes 15, and after the flexible secondary screen 4 is installed, the marking points of the adjacent two secondary insulating modules are connected to obtain intermediate points, wherein the positions of the intermediate points are the positions of the internal thread blind holes 15. The connecting mark points can be in a wire drawing mode or a tool is manufactured, the length of the tool is equal to the distance between the two mark points, the middle of the tool is provided with the open hole mark, and the tool is opened after corresponding to the mark points on the two adjacent sub-layer insulating modules.
As shown in fig. 11, the main layer insulation module 2 includes a lower insulation block 201, a middle plate 202, an upper insulation block 203 and a top plate 204 which are sequentially stacked from bottom to top, edges of the lower insulation block 201 and the upper insulation block 203 are respectively provided with rectangular gaps, a second lower cushion block 205 is installed in the rectangular gaps of the lower insulation block, the hardness of the second lower cushion block 205 is greater than that of the lower insulation block 201, the lower insulation block 201 and the upper insulation block 203 can be made of insulation materials with smaller heat conductivity coefficients, such as polyurethane foam, and the middle plate 202 and the top plate 204 can be made of hard nonmetallic materials, such as wood boards, plywood and the like; the lower heat insulation block 201, the middle plate 202, the upper heat insulation block 203 and the top plate 204 are respectively in rectangular plate-shaped structures, and are bonded into a whole through glue, and the edge of the top plate 204 is spaced from the edge of the upper heat insulation block 203 to form a lap joint groove 206.
Preferably, the top plate 204 is provided with crisscross penetrating gas displacement slits 207, and the penetrating gas displacement slits 207 penetrate through the thickness direction of the top plate 204; the upper thermal block 203 is provided with a non-penetrating gas displacement slit 208 corresponding to the penetrating gas displacement slit 207. The penetrating gas displacement slots 207 cooperate with the non-penetrating gas displacement slots 208 to form a gas flow space, so that inert gas filled between the main layer sealing film 12 and the main layer insulation module 2 can flow after the main layer sealing film 12 is installed, and certain ripple stress can be released when the main layer sealing film 12 is provided with ripples.
Step 5, as shown in fig. 7 and 8, rectangular notches of adjacent main layer insulation modules 2 are oppositely arranged to form upper spaces, the upper spaces vertically correspond to the lower spaces, and a second anchor piece 8 and a second pressing block 11 are installed in each upper space. When in installation, one end of the second anchoring piece 8 passes through the flexible secondary screen 4 and is in threaded fit with the internal threaded blind hole 15, then the second pressing block 11 is installed, and the other end of the second anchoring piece 8 is in threaded fit connection with the second pressing block 11. The second pressing block 11 is matched and clamped into a rectangular notch at the edge of the upper heat insulation block 203, the second pressing block 11 is lapped and pressed on the middle plate 202 above the second lower cushion block 205, and the main layer insulation module 2 is pressed through the second pressing block 11.
Preferably, the second pressing block 11 is provided with an elastic space for the telescopic adjustment of the second anchoring member 8, and a deformation buffer space is provided for the main layer insulation module when the expansion with heat and the contraction with cold change.
Specifically, the second press block 11 includes a second lower press plate 1101, a second middle bridge block 1102, and a second upper support plate 1103, and the second lower press plate 1101 and the second upper support plate 1103 are disposed on the upper and lower sides of the second middle bridge block 1102, respectively; the second middle bridging block 1102 is provided with a containing cavity corresponding to the second lower pressing plate 1101;
the second anchoring member 8 comprises a second screw rod 801, external threaded connectors are respectively arranged at two ends of the second screw rod 801, one end of the second screw rod 801 penetrates through the second lower pressing plate 1101 in a clearance mode and then stretches into a containing cavity of the second middle bridging block 1102, a second disc spring 802 and a second locking cap 803 are arranged in the containing cavity of the second middle bridging block 1102 corresponding to the second screw rod 801, the second disc spring 802 is sleeved outside the second screw rod 801, the second locking cap 803 limits the second disc spring 802 between the second lower pressing plate 1101 and the second locking cap 803, and the second locking cap 803 is in threaded fit connection with the end portion of the second screw rod 801. When the main layer insulation module 2 is subjected to thermal expansion and contraction, the second screw 801 moves relatively to the second lower pressing plate 1101 so as to adapt to the deformation of the main layer insulation module 2, and the main layer insulation module 2 is prevented from being damaged due to overlarge local stress.
A circle of second bolts 1104 are uniformly arranged on the edge of the second upper supporting plate 1103, and the second bolts 1104 sequentially penetrate through the second upper supporting plate 1103 and the second middle bridging block 1102 and then are in threaded fit connection with the second lower pressing plate 1101; the second middle bridge piece 1102 is provided with a step hole corresponding to each second bolt 1104, a second spring 1105 is arranged in the step hole of the second middle bridge piece 1102, one end of the second spring 1105 extends out of the step hole of the second middle bridge piece 1102, and the second bolts 1104 penetrate through the second springs 1105 in the step hole of the second middle bridge piece 1102.
Before the main insulating module 2 is installed, a second lower cushion block 205 is installed in a rectangular notch at the edge of the lower insulating block 201, and the second lower cushion block 205 is fixedly connected with the lower insulating block 201 and the middle plate 202 in a bonding or rivet connection mode. When the main layer insulation module 2 is installed, the second pressing block 11 is lapped and embedded into a rectangular notch at the edge of the upper heat insulation block 203 to fix the main layer insulation module 2 above the sub layer insulation module 1.
After the main layer insulating modules 2 are installed and before the fastening clamping plates 9 are installed, flexible heat preservation materials 14 are filled between the adjacent main layer insulating modules 2, and the upper space is not filled with the flexible heat preservation materials.
Step 6, installing a fastening clamping plate 9 in the lapping groove 206 at the edge of the main layer insulation module 2, as shown in fig. 9, embedding the fastening clamping plate 9 into the lapping groove 206 at the edge of the adjacent main layer insulation module, and realizing the installation of the fastening clamping plate 9 by the threaded fit connection between the third anchoring piece 10 and the upper end surface of the second pressing block 11 after passing through the fastening clamping plate 9. The length of the fastening clip 9 provided along the length direction of the main layer insulation module 2 is greater than the length of the fastening clip 9 provided along the width direction of the main layer insulation module 2.
The two ends of the fastening clamping plates 9 arranged along the width direction of the main layer insulation module 2 are respectively provided with a lap joint end 902, as shown in fig. 13, the lap joint ends 902 between the fastening clamping plates 9 arranged along the width direction of the main layer insulation module 2 are connected in an up-down lap joint mode, the thickness of the lap joint end 902 is half of the thickness of the fastening clamping plates 9, the lap joint ends 902 are formed to be the same as the thickness of the fastening clamping plates 9 after being lapped up and down, and lap joint positions can be fixedly connected by rivets. The fastening clips disposed along the length direction of the main insulation module are not provided with overlap ends, as shown in fig. 14. In this embodiment, three third anchors 10 are connected to the fastening clip 9 provided along the longitudinal direction of the main layer insulation module 2, and one third anchor 10 is connected to the fastening clip 9 provided along the width direction of the main layer insulation module 2.
After the fastening clamping plate 9 is installed, a main layer sealing film 12 is paved on the main layer insulating module, the main layer sealing film 12 is made of invar steel or 304L stainless steel, the 304L stainless steel can be corrugated, a metal welding plate 901 is installed on the fastening clamping plate 9, the edge of the main layer sealing film 12 is welded on the metal welding plate 901 in a lap joint mode, the main layer sealing films 12 are connected in a lap joint welding mode, and the installation is completed as shown in fig. 10.
The third anchoring member 10 comprises a third screw 1001, a metal sealing piece 1002 and a metal sealing cap 1003, as shown in fig. 8, one end of the third screw 1001 is in threaded fit connection with the upper end surface of the second pressing block 11, then the other end of the third screw 1001 passes through the fastening clamping plate 9, the metal sealing cap 1003 is in threaded fit connection with the end of the third screw 1001, and the metal sealing piece 1002 is locked on the fastening clamping plate 9 through the metal sealing cap 1003. The edge of the main layer sealing film 12 is pre-opened corresponding to the position of the third anchoring piece 10, the main layer sealing film 12 at the opening position is lap welded on the metal sealing sheet 1002, and then the metal sealing cap 1003 is welded with the metal sealing sheet 1002, so that the tightness of the main layer sealing film 12 is ensured.
Preferably, the third screw 1001 is further provided with a lock nut 1004, and the third screw 1001 is locked from the upper end surface of the second press block 11 by the lock nut 1004 after the third screw 1001 is screwed to the second press block 11.
The present embodiment is further illustrative of the present invention and is not to be construed as limiting the invention, and those skilled in the art can make no inventive modifications to the present embodiment as required after reading the present specification, but only as long as they are within the scope of the claims of the present invention.
Claims (16)
1. A method of installing a thin film containment system for cryogenic liquid cargo storage and transportation, the method comprising:
step 1, marking out a positioning line and a positioning point on a ship body structure, installing an anchor base according to the positioning point, then installing a sub-layer insulation module according to the positioning line, prefabricating a rigid sub-screen wall on the sub-layer insulation module, forming a plurality of lower spaces between adjacent sub-layer insulation modules, and positioning the anchor base at the bottom of the lower spaces;
step 2, installing a first anchoring piece in each lower space, wherein one end of the first anchoring piece is in threaded fit connection with an anchoring piece base, the other end of the first anchoring piece is connected with a first pressing block, and the first pressing block presses the sub-layer insulation module and fills the upper end of the lower space to be flush with the upper end surface of the sub-layer insulation module; the center of the upper end face of the first pressing block is provided with an internal thread blind hole;
step 3, paving a flexible secondary screen along the gap between adjacent secondary insulating modules after temporarily plugging the internal thread blind holes, wherein the flexible secondary screen covers the edge of the rigid secondary screen and completely covers the upper end face of the first pressing block, and the flexible secondary screen is bonded with the rigid secondary screen and the upper end face of the first pressing block;
step 4, cutting off the position of the flexible secondary screen wall corresponding to the internal thread blind hole, removing temporary plugging at the internal thread blind hole, installing a main layer insulation module corresponding to each secondary layer insulation module, placing the main layer insulation module on the rigid secondary screen wall of the secondary layer insulation module, and arranging a lap joint groove at the edge of the upper end face of the main layer insulation module;
step 5, forming a plurality of upper spaces between adjacent main layer insulating modules, wherein the upper spaces correspond to the lower spaces up and down, a second anchoring piece and a second pressing block are arranged in each upper space, one end of the second anchoring piece penetrates through the flexible secondary screen wall and then is in threaded fit connection with the internal thread blind hole, the other end of the second anchoring piece is connected with the second pressing block, and the second pressing block presses the main layer insulating modules;
and 6, installing a fastening clamping plate in the lap joint groove at the edge of the main layer insulating module, embedding the fastening clamping plate into the lap joint groove at the edge of the adjacent main layer insulating module, and penetrating through the third anchoring piece through the threaded fit connection between the fastening clamping plate and the upper end surface of the second pressing block to realize the installation of the fastening clamping plate.
2. The method for installing the thin film containment system for low-temperature liquid cargo storage and transportation according to claim 1, further comprising paving a main layer sealing film above the main layer insulation module, wherein a metal welding plate is arranged on the fastening clamping plate, the main layer sealing film is covered above the main layer insulation module after the fastening clamping plate is installed, and the main layer sealing film is welded with the metal welding plate.
3. The method for installing the film type containment system for low-temperature liquid cargo storage and transportation according to claim 2, wherein the third anchoring piece comprises a third screw rod, a metal sealing piece and a metal sealing cap, one end of the third screw rod is in threaded fit connection with the upper end face of the second pressing block, then the other end of the third screw rod penetrates through the fastening clamping plate, the metal sealing cap is in threaded fit connection with the end part of the third screw rod, and the metal sealing piece is locked on the fastening clamping plate through the metal sealing cap.
4. The method for installing a thin film containment system for low-temperature liquid cargo storage and transportation according to claim 3, wherein the third screw is further provided with a locking nut, and the third screw is locked from the upper end surface of the second pressing block through the locking nut after the third screw is in threaded connection with the second pressing block.
5. The method for installing a thin film containment system for low temperature liquid cargo storage and transportation according to claim 3, wherein when the main sealing film is installed, the edge of the main sealing film is opened in advance at the position corresponding to the third anchoring member, the main sealing film at the opened position is lap-welded on the metal sealing sheet, and then the metal sealing cap is welded with the metal sealing sheet.
6. The method for installing the thin film containment system for low-temperature liquid cargo storage and transportation according to claim 1, wherein in the step 1, a distance plate is further sleeved outside the anchor base, the distance plate is square, a through hole is formed in the center of the distance plate corresponding to the anchor base, and the anchor base penetrates through the through hole in the center of the distance plate.
7. The method of installing a thin film containment system for low temperature cargo storage and transportation according to claim 6, wherein in step 1, before the installation of the sub-layer insulation module, strip-shaped bearing resin is coated on the opposite surface of the sub-layer insulation module where the rigid sub-screen is arranged, and the sub-layer insulation module is positioned according to the positioning line and the distance plate.
8. The method for installing the film type enclosure system for low-temperature liquid cargo storage and transportation according to claim 1, wherein the edges of the sub-layer insulating modules are provided with U-shaped grooves, first lower cushion blocks are arranged in the U-shaped grooves, and the U-shaped grooves of adjacent sub-layer insulating modules are oppositely arranged to form lower spaces; the first pressing block is clamped into the U-shaped groove from the upper part of the first lower cushion block.
9. The method for installing the thin film containment system for low-temperature liquid cargo storage and transportation according to claim 8, wherein the first lower cushion block is matched with the U-shaped groove to form a cross-shaped space in the lower space, a cross-shaped rigid heat insulation material is sleeved outside the first anchoring piece, and the cross-shaped rigid heat insulation material is filled in the cross-shaped space.
10. The method of installing a thin film containment system for low temperature liquid cargo storage and transportation according to claim 1, wherein in the step 3, a diaphragm is mounted on the upper end surface of the first pressing block in an adhesive manner, the diaphragm covers the blind hole with internal threads, the upper end surface area of the first pressing block outside the diaphragm is roughened, and then the side of the flexible secondary wall coated with the adhesive is adhered to the rigid secondary wall and the upper end surface of the first pressing block after the surface of the flexible secondary wall is coated with the adhesive.
11. The method for installing the film enclosure system for low-temperature liquid cargo storage and transportation according to claim 10, wherein in the step 4, the flexible secondary screen wall and the diaphragm corresponding to the positions of the internal thread blind holes are sequentially cut off, and the cut-off area is equal to the caliber of the internal thread blind holes and does not exceed the scope of the diaphragm.
12. The method for installing the thin film containment system for low-temperature liquid cargo storage and transportation according to claim 1, wherein the main layer insulation module comprises a lower insulation block, a middle plate, an upper insulation block and a top plate which are sequentially stacked and prefabricated into a whole, rectangular gaps which correspond up and down are respectively arranged at the edges of the lower insulation block and the upper insulation block, and the rectangular gaps of adjacent main layer insulation modules are oppositely arranged to form an upper space; the area of the top plate is smaller than that of the upper heat insulation block, and the edge of the top plate forms a lap joint groove on the upper end face of the upper heat insulation block.
13. The method for installing a thin film containment system for low-temperature liquid cargo storage and transportation according to claim 12, wherein the top plate is provided with crisscrossed penetrating gas displacement slits penetrating through the thickness direction of the top plate; the upper heat preservation block is provided with a non-penetrating gas replacement joint corresponding to the penetrating gas replacement joint.
14. The method for installing the thin film containment system for low-temperature liquid cargo storage and transportation according to claim 12, wherein a second lower cushion block is installed in a rectangular notch at the edge of the lower heat preservation block before the main insulating module is installed, the hardness of the second lower cushion block is greater than that of the lower heat preservation block, and the second lower cushion block is fixedly connected with the lower heat preservation block and the middle plate; when the main layer insulating module is installed, the second pressing block is lapped and embedded into a rectangular notch at the edge of the upper heat insulation block to fix the main layer insulating module above the sub layer insulating module.
15. The method for installing the film enclosure system for low-temperature liquid cargo storage and transportation according to claim 14, wherein the second lower cushion block is fixedly connected with the lower heat insulation block and the middle plate by bonding or rivet connection.
16. The method for installing a thin film containment system for low-temperature liquid cargo storage and transportation according to claim 1, wherein flexible insulation materials are filled between adjacent sub-layer insulation modules before flexible sub-screen walls are installed after the sub-layer insulation modules are installed; after the main layer insulating modules are installed and before the fastening clamping plates are installed, flexible heat-insulating materials are filled between adjacent main layer insulating modules; the flexible insulating material fills the areas outside the lower space and the upper space.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410251272.2A CN117818844A (en) | 2024-03-06 | 2024-03-06 | Method for installing thin film type enclosure system for low-temperature liquid cargo storage and transportation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410251272.2A CN117818844A (en) | 2024-03-06 | 2024-03-06 | Method for installing thin film type enclosure system for low-temperature liquid cargo storage and transportation |
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| CN202410251272.2A Pending CN117818844A (en) | 2024-03-06 | 2024-03-06 | Method for installing thin film type enclosure system for low-temperature liquid cargo storage and transportation |
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